Drilling-machine



(No Model.)

J. T. GOWLEY. DRILLINGMAGHINE.

Ng. 131,108-n/l Patented July 1, 1890.

www www@ mvawlfo/c Wawy l QNX- @m UNITED STATES PATENT OFFICE.

JAMES T. COIVLEY, OF LOVELL, MASACIIUSETTS.

DRlLLlNG-MACHINE.

SPECIFICATION forming part of Letters Patent No. 431,108, dated July 1, 1890.

Application filed January 6, 1890. Serial No. 335,981. (No model.)

T0 all whom t may concern:

Be it known that I, JAMES T. COWLEY, a citizen of the United States, residing at Lowell, in the county of Middlesex and State of Massachusetts, have invented certain new and useful Improvements in Drilling Apparatus, of which the following is a specilication.

My invention relates to drill-press and tapping-machine attachments, and more particularly to that class wherein a series of tools are to be used in succession; and it has for its object to provide means whereby the tools may be brought into operative relation with the article to be worked upon, so that a single spindle may be used to operate one and all of the tools, and in this way the adjustment of the article subjected to a series of operations need not be changed and perfect registration of the work is accomplished.

My invention consists "in an attachment for this purpose constructed, arranged, and operatingsubstantially as hereinafter set forth.

Referring to the accompanying drawings, Figure 1 is a Vertical longitudinal section of a device embodying my present invention. Fig. 2k is a similar view showing a modification thereof, and Fig. 3 is a similar view showing a detail.

The attachment is adapted to be mounted in a drill-press-tapping or similar machine, and I have illustrated herein so much of the frame A as is necessary to understand my invention. The spindle B may be driven by the usual shaft of a machine of the character mentioned, and of course can be rotated constantly in one direction, or reversed and caused to advance or retreat, as desired. Iloosely mounted upon the spindle B is a sleeve C, and loosely mounted upon this sleeve is the hub D. The hub is provided with a cam-slot d, through which passes a stud or screw D', which engages the sleeve C; and it will readily be understood that as the sleeve is rotated with relation to the hub it moves the hub upward or downward the extent of the cam-slot. Mounted on the end of the spindle B or forming part thereof is a plate E, shown as provided with a screw tit ting the end of the spindle and having upon its lower surface a rib or projection e, forming part of a clutch.

4cesses m in the head.

Mounted on the hubDand on a projection thereof at an inclination to the axis of the spindle is a head-piece F, having a number of projecting extensions G, there being five or some other odd number, so that they will bet-` ter clear the frame of the machine when the hub and head-piece are raised to the highest position. These extensions G constitute a socket or holder for a tool, and I have shown each extension as provided with an ordinary split clamp or clutch H, clamped by a nut I'I, to secure the tool I in position. Each one of these clutches II is provided on its upper end with a projecting ange 71,7 forming a bearing on the head, and the face is recessed, as at h2, to form a member of the clutch to be engaged by the rib or projection e ou the spindle B. The head-piece F is provided with a radiallyextending bar J, adapted to engage with the standard or upright of the frame A, to maintain the head in position and keep it from swinging; and it will be seen that the head is placed and retained between the line of the spindle and the rear portion of the frame of the machine, thus leaving the front and sides of the machine free from obstructions to the operator. This head F swings upon the bearing K, mounted on the hub D, and may be maintained in any desired position against accidental misplacements by a spring L, sccured to the hub and engaging a recess g in the extensions G, or, as is preferred, by a pin M, fitting a recess in the hub and forced under pressure of the spr-ing m to engage re- From this it will be seen that the main spindle B can be connected to any one of the other or special spindles carrying the respective tools by means of the clutch e 7L, and the tool operated in accordance with the motion of the main spindle. l/Vhen it is desired to bring into operation any one of the other tools, the thumb-piece D is rotated in the slot d of the hub, causing the hub and its connections to be depressed a short distance, so as to disengage the clutch c 7L. Then the head F can be rotated to bring the desired tool in alignment with the main spindle B and the thumb-piece rotated in the opposite direction, causing the clutch portions to engage, and the operations proceed as before.

In Fig. 3 I have illustrated a modification IOO of the means for raising and lowering the hub D on the sleeve C. In this case the sleeve C is provided with a lateral projection c, extending through a vertical slot d in the hub D; and pivoted to lugs d2 on the outside of the hub D is a cam-piece D2, which can be turned to raise and support the hub D in the position shown in the drawings or to allow thehub to become depressed to disengage the clutch.

In Fig. 2 I have illustrated another arrangement whereby the clutch is engaged by a spring, so that it may be more surely and easily operated. In this case the sleeve C is shortened, and the spindle B has a shoulder at b, against which rests a washer O, and a spring P surrounds the lower portion of the spindle and bears one end against the head or plate E of the clutch and the other against the washer O. In this construction the spring and washer rotate with the spindle; but instead of this the hub D might be provided with a shoulder d3, and the washer O (shown in dotted lines) be placed so as to bear upon this shoulder and the spring arranged above it, in which case the spring and washer would remain stationary. In both instances it will be observed that when a tool is in operation both ends of the spring bear upon parts of the device that are either stationary orrotating, as the case may be, and is therefore free from friction. When the tool is to be engaged or disengaged, the spring will be compressed and the hub D will be lowered to disengage the head of the special spindle carrying the tool from the portion e of the clutch. In the use of such an instrument it often happens that the tools vary from each other in size and form in a very slight degree, so as not to be readily recognized by the operator; and, in order to provide that the proper tools may be used in regular succession, I attach to the head F, or preferably the extensions G thereof, a tablet Q, stamped or ot-herwise marked in some way to correspond with the size, number, or name of the tool to be carried by that particular extension. This tablet may be applied in various ways, so as to be permanent and unchangeable. the extension might be permanently marked For instance,

at the point R; but I prefer to have detachable tablets and to provide them with holes q, having slotted extensions, whereby they may be readily slipped over the screws S and moved sidewise through the slots, and the screws being tightened the tablets are held in place on the extensions.

Having thus described my invention, what I claim, and 'desire to secure by Letters Patent` isl. The improved drill-head attachment` having the main spindle, a sleeve mounted thereon, a hub mounted on the sleeve, and a head carrying a number of spindles, the head being arranged at an inclination to the main spindle and adapted to bring any one of the spindles in alignment with the main spindle, substantially as described.

2. In the improved drill-head attachment having a main spindle and hub and a head carrying a number of spindles and arranged at an inclination to the main spindle, a locking device for maintaining the head in position relative to the hub, substantially as described.

3. The combination, with the frame of the press, of a main spindle supported thereon, a sleeve mounted on said spindle, a hub mounted on the sleeve, a head mounted on-the hub at an inclination to the main spindle and carrying a number of spindles, and a bar extending from said head and adapted to bear upon the frame of the machine to maintain the head between the main spindle and frame, substantially as described. I

4. The combination, with the main spindle recessed at its lower end, a sleeve supported on said spindle, a hub surrounding said sleeve, a plate forming a portion of the clutch secured to the end of the spindle, and a spring' interposed between the plate and sleeve, substantially as described.

In testimony whereof l have signed my name to this specification in the presence of two subscribing witnesses.

. JAMES T. COVVLEY.

Witnesses:

A. E. HUMrHREYs, WILLIAM HILTZ. 

